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Java > Open Source Codes > org > jacorb > orb > giop > LFUStatisticsProviderImpl


1 /*
2  * JacORB - a free Java ORB
3  *
4  * Copyright (C) 1997-2004 Gerald Brose.
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Library General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Library General Public License for more details.
15  *
16  * You should have received a copy of the GNU Library General Public
17  * License along with this library; if not, write to the Free
18  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19  */
20
21 package org.jacorb.orb.giop;
22
23
24 /**
25  * @author Nicolas Noffke
26  * @version $Id: LFUStatisticsProviderImpl.java,v 1.4 2004/05/06 12:40:00 nicolas Exp $
27  */
28
29 public class LFUStatisticsProviderImpl
30     implements StatisticsProvider
31 {
32     private long lifetime_begin = 0;
33     private long invocations = 0;
34
35     public LFUStatisticsProviderImpl()
36     {
37         lifetime_begin = System.currentTimeMillis();
38     }
39
40     /**
41      * A message chunk with the given size has been sent over the associated
42      * Transport.
43      */
44     public void messageChunkSent( int size )
45     {
46     }
47
48     /**
49      * The transport has been flushed. This means that sending of a
50      * message is complete.
51      */
52     public void flushed()
53     {
54         ++invocations;
55     }
56
57
58     /**
59      * A message with the given size has been received by the
60      * associated Transport.
61      */
62     public void messageReceived( int size )
63     {
64         ++invocations;
65     }
66     
67     public double getFrequency()
68     {
69         double lifetime = System.currentTimeMillis() - lifetime_begin;
70         return invocations / lifetime;
71     }
72 }
73
74
75
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